2556380873941 has 2 divisors, whose sum is σ = 2556380873942. Its totient is φ = 2556380873940.

The previous prime is 2556380873911. The next prime is 2556380873989. The reversal of 2556380873941 is 1493780836552.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1912287951025 + 644092922916 = 1382855^2 + 802554^2 .

It is a cyclic number.

It is not a de Polignac number, because 2556380873941 - 2⁵ = 2556380873909 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2556380873941.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2556380873911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1278190436970 + 1278190436971.

It is an arithmetic number, because the mean of its divisors is an integer number (1278190436971).

It is a 1-persistent number, because it is pandigital, but 2⋅2556380873941 = 5112761747882 is not.

Almost surely, 2^{2556380873941} is an apocalyptic number.

It is an amenable number.

2556380873941 is a deficient number, since it is larger than the sum of its proper divisors (1).

2556380873941 is an equidigital number, since it uses as much as digits as its factorization.

2556380873941 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43545600, while the sum is 61.

The spelling of 2556380873941 in words is "two trillion, five hundred fifty-six billion, three hundred eighty million, eight hundred seventy-three thousand, nine hundred forty-one".